61615066516 has 12 divisors (see below), whose sum is σ = 110740592788. Its totient is φ = 29974897152.

The previous prime is 61615066493. The next prime is 61615066523. The reversal of 61615066516 is 61566051616.

It can be written as a sum of positive squares in 2 ways, for example, as 25263830916 + 36351235600 = 158946^2 + 190660^2 .

It is a super-2 number, since 2×61615066516² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208158861 + ... + 208159156.

Almost surely, 2^61615066516 is an apocalyptic number.

It is an amenable number.

61615066516 is a deficient number, since it is larger than the sum of its proper divisors (49125526272).

61615066516 is a wasteful number, since it uses less digits than its factorization.

61615066516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416318058 (or 416318056 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 61615066516 in words is "sixty-one billion, six hundred fifteen million, sixty-six thousand, five hundred sixteen".